The 2009–10 season of Dinamo București's 61st consecutive season in Liga I. In this season, Dinamo competed in Liga I, Cupa României and UEFA Europa League. Dinamo played in the playoff for Europa League against Czech football club FC Slovan Liberec. In the first leg the supporters invaded the pitch causing the match to be abandoned in the 88th minute when the score was 2–0 for Slovan. The UEFA Control and Disciplinary Body awarded a default 0–3 defeat against Dinamo. One week later in Liberec Dinamo managed a memorable comeback and qualified in the Europa League 2009-10 Group Stage after winning 3–0 in Liberec after 90 and 120 minutes and winning 9–8 at penalties after 10 series. Andrei Cristea scored once and Marius Niculae twice. Dinamo was drawn in group F along Panathinaikos Athens, G